Mattress



FIG. 1 is a top perspective view of a mattress.

FIG. 2 is a front view of the mattress of FIG. 1 .

FIG. 3 is a back view of the mattress of FIG. 1 .

FIG. 4 is a left side view of the mattress of FIG. 1 .

FIG. 5 is a right side view of the mattress of FIG. 1 .

FIG. 6 is a top view of the mattress of FIG. 1 .

FIG. 7 is a bottom view of the mattress of FIG. 1 .

FIG. 8 is a detailed top perspective view of the mattress in FIG. 1 , showing the design of a corner of the mattress enlarged for ease viewing; and,

FIG. 9 is a side sectional view of the mattress of FIG. 1 , showing flaps stitched into a sidewall of the mattress where the flaps are of a different material than the sidewall.

A characteristic feature of the design resides in visible stitching on the mattress, which forms a part of the claimed design. Other broken lines are included for the purpose of illustrating unclaimed portions of the mattress that form no part of the claimed design. The [dash]-[long dash]-[dash] line shown in FIG. 7 is a bound of the claim and forms no part of the claimed design. 

CLAIM The ornamental design for a mattress, as shown and described. 